I believe they were created specifically for TV/video, to highlight the rotation (or not) of the ball during tricks. I don't think they were actually anything to do with Pokemon, after all, they did not have the black stripe between the white and red halves. But an informed correction, or any further info is welcome.

I've heard that 300 were made, I could be wrong though. I heard that the Oozora ones were made for some kind of TV production and that the Mugen ones were made (and predominantly held by the JKA) for teaching, I'm guessing because the vertical split makes it very easy to distinguish the spin (or lack of) which would ultimately make things easier while learning, which has already been said haha.

I don't know how much Pokemon mugens were made, but it is very special for sure.maybe in the future i found out how much there were made.and when and how they getting this, (tournament or some like that, same story as the green emerald and the purple mugen)

true story about the ozora red white, they were made for TV, the one i have was the one that was on TV as well, (lucky me)

the ozora factory made also specials for the JKA.like the white, lavender and orange (orange info i've got from thorny)And a deathray looking blue Sparkle ozora as well, this one offered by a JKA member to me, he wanted to trade when i was in japan last summer.